hi ya
adding my twists/comments... please ignore if ya so desire :-0
2 complete boxes is better ???
- if one system dies... the other keep cranking along
- if maintenance is done right... maintaining 5 or 100 servers
should NOT make any difference .. everything automated
dual cpu system
- if the power supply dies...both cpu's is dead
- the cpu have to share memory/disks/ethernet to do its local work
- if the disk dies...both cpu sits idle
systems typically die due to (cheap) fans dying...
am assuming the same overhead for network traffic between servers ...
performance between single and dual-cpu systems can be different
depending on can the tasks be divided into nice pieces for each server
vs divided between 2 CPUs on the same motherboard
- midtower/full tower atx case is super cheap ( $25 - $100 range )
- 4U chasis is cheap
- 2U/3U chasis is about $50 more
- 1U chassis is about $250 - $300 ---
- cheap 1U cases at $150 range...
( do it yourselef is $100 or less? but you spend lots of time with
( wires, led, screws, heatsinks,..etc..etc..
Jim's comparason between two systems at $505 vs $1023 for dual looks
good for network booted diskless machines
- i too would like to see some benchmarks for these
performance comparsons ...
But if you have a disk-based system...
than there is some differences in minor costs differences
between 2 systems vs one dual-cpu system
Buildable/tested AMD 1U system
------------------------------
$ 250 C1400 14" deep 1U
$ 125 Asus A7S w/ onboard NIC w/ onboard SVGA
$ 150 AMD 1.4G XP ( 1700+ )
$ 160 512MB DDR PC2100
$ 250 Maxtor 120GB disks
$ 75 5x extra fans
----- ------------------
$1010 parts-off-the-shelf
$2020 for two of um .... more expensive than one dual-cpu system ...:-)
Dual CPUs
------------------
$ 250 C1400 14" deep 1U
$ 250 (generic) Tyan dual-cpu mb - can go to $500 mb too
$ 400 2x AMD 1.4G MP ( 1600+ )
$ 160 512MB ddr pc2100
$ 250 maxtor 120GB
$ 75 5x extra fans
----- -------------
$1385 Dual cpu system off the shelf
have fun
alvin
http://www.linux-1u.net
On Thu, 7 Mar 2002, Jim Fraser wrote:
>> Robert,
>> You bias the calculation a bit with the selection of your hardware...if you
> use inexpensive COTS..we are talking something like 50 per case not
> 350...also a decent mother board with NIC can be had for 150 and you need
> to look at the difference between XP and MP proc costs currently a
> difference of 90 bucks per cpu on pricewatch. I think if you re-evaluate
> your calcs based on that you get something like:
>>> Single DUAL
> MB (w/NIC) 150 220
> CPU (1900) 180 239 X 2
> case 50 75 (50+ 25 some super PS and
> cooling)
> memory(512DDR) 125 125 *2
> _________ __________
> 505 1023
> X2
> 1010 vs 1023
>> As far as I see it is awash price wise. Most dual CPU AMD setups I have
> seen in rack mounts exceed $2000 easy as they require exotic cooling
> measures. On the other hand, there will be some cost penalty associated
> with switch costs having more single CPU's.
>> I agree with your response to the application and effective throughput and I
> think you have to run your program before you actually know how it will
> perform on these things...looking at benchmarks can be very misleading.
>> I have not seen any benchmarks on the dual AMD setups comparing them to
> singles, have you?
>> That was quite response you posted!
>> Thanks
>> Jim
>